JP6512176B2 - Pin-bush cleaning device and cleaning method for metal frame - Google Patents

Description

  The present invention relates to a device for cleaning pins and bushes of a metal frame for green sand mold molding used in a sand mold automatic molding line and a cleaning method.

  In an automatic molding line of sand molds in which molds are formed on upper and lower flasks respectively and then these upper and lower molds are put together and used as molds, upper frame pins and upper frame pins as positioning means for mold alignment of upper and lower molds. Lower frame bush etc. are used. However, if the casting sand adheres to these parts, the positioning can not be accurately performed, so that a pin and bush cleaning device as shown in Patent Documents 1 and 2 is conventionally used.

  Patent Document 1 describes an automatic forming line in which a guide pin cleaning device and a guide bush cleaning device are disposed on the upper frame line and the lower frame line, respectively. In the automatic molding line of this patent document 1, the upper frame and the lower frame, and the equipment configuration using dedicated molding machines respectively, the upper frames or lower frames are continuously conveyed, and pins are always aligned with each other. It is transported by Therefore, it is preferable to use a cleaning device in which two pin cleaning brushes dedicated to the upper frame line and two bush cleaning brushes dedicated to the lower frame line are attached.

  However, the molding line of raw sand mold is not only high-speed molding equipment using upper frame, lower frame, dedicated molding machines respectively, but also one molding machine, molding line of upper frame and lower frame alternately molded There is also a great demand. In the molding line in which the upper frame and the lower frame are alternately formed, the combination of the upper frame pin on the downstream side of the upstream frame and the lower frame bush on the upstream side of the downstream frame and the downstream lower frame bush and the downstream frame of the upstream frame Since the combination of the upper frame pins on the upstream side of the frame is alternately transported, there is a problem that the pin and bush cleaning device of Patent Document 1 can not be used.

  On the other hand, in Patent Document 2, a metal frame using an upper frame bush having a function of a bush and a lower frame bush having a function of a pin for positioning of upper and lower frames is a single molding machine, upper frame and lower frame An apparatus for cleaning upper and lower frame bushes having different shapes is described, which is used for a molding line for alternately molding. In the molding line in which the upper frame and the lower frame are alternately formed, the upper frame and the lower frame are alternately transported. Thus, every one frame feed, the combination of the downstream upper frame bush of the upstream frame and the upstream lower frame bush of the downstream frame, and the combination of the downstream lower frame bush of the upstream frame and the upstream upper frame bush of the downstream frame Since the upper frame bush brush and the lower frame bush brush attached to the lift table of the cleaning device are transported alternately, they are rotated 180 ° forward or reverse by the reverse drive rotor every frame feed. As a structure to turn, it is set as the structure which replaces arrangement of a brush.

  Although it is necessary to match the pitch of two brushes attached to Patent Documents 1 and 2 with the pitch of the upper frame bush and the lower frame bush via the contact surface of the contact surfaces of the adjacent two metal frames, Since the contact surfaces of the contact surfaces of the metal frame are intertwined, the pins, bushes or pins and bushs have different pitches due to wear of the contact faces, adhesion of cast burrs, and biting, and they deviate from the pitch on the brush side, Poor cleaning and premature wear of the brush may occur.

  Therefore, recently, as shown in FIG. 7, the pin cleaning brush 103 and the bush cleaning brush 104 are arranged at the same pitch as the two upper frame pins 101 or the lower frame bushes 102 forming one frame pair. The frame dedicated pin cleaning device 105 and the lower frame dedicated bush cleaning device 106 tend to be installed. However, since three frames are required for the installation space of the pin and the bush cleaning device, the number of metal frames from the frame separation device 107 to the molding machine 108 increases, and it is necessary to make the molding line longer.

JP, 2015-73996, A Japanese Utility Model Application Publication No. 58-71443

  Accordingly, an object of the present invention is to solve the above-mentioned conventional problems and, in a molding line in which upper frames and lower frames are alternately formed, a device for cleaning the bushes having different shapes in pins, bushes or upper and lower frames of upper and lower frames. It is an object of the present invention to provide a metal frame pin / bush cleaning device and method for green sand mold making that can be installed in a small installation space.

The pin and bush cleaning device for a metal frame according to the present invention made to solve the above problems has an upper frame with a pair of upper frame pins at the front and back and a lower frame with a pair of lower frame bushes at the front and rear A lift table is provided below the transport line which is alternately arranged and repeatedly conveyed while being moved and stopped, and on this lift table, a pair of upper frame cleaning brushes for cleaning the pair of upper frame pins; A pair of lower frame cleaning brushes for cleaning the pair of lower frame bushes are installed at a predetermined pitch in the longitudinal direction of the transport line, and an actuator for laterally moving the elevating table at the predetermined pitch is provided. a position for the upper frame cleaning brush matches the pair of upper frame pin of the upper frame is stopped, to switch the position of the pair of lower frame for cleaning brushes matches the pair of lower frame bushing of the lower frame that has stopped It is an butterfly. Preferably, the elevating table is placed on a traversing device and moved laterally in the longitudinal direction of the transport line by an actuator .

Further, the method for cleaning a metal frame pin and bush according to the present invention, which was made to solve the above-mentioned problems, uses an above-mentioned cleaning device and an upper frame provided with a pair of upper frame pins in the front and back and a pair of lower Lower frames provided with frame bushes are alternately arranged on the transfer line and transported while repeating movement and stopping, and when the upper frame stops at the position of the lifting table, the lifting table is raised toward the upper frame to be paired The pins for the upper frame are cleaned by the upper frame cleaning brush, and then the lifting table is lowered and moved laterally by the actuator, and the lifting table is raised toward the stopped lower frame to clean the pair of lower frames The brush of the lower frame is cleaned with a brush .

  According to the present invention, it is possible to clean the upper frame pin and the lower frame bush, or the upper frame bush and the lower frame bush having different shapes, in the green sand mold molding line in which the upper frame and the lower frame are formed alternately. it can. In addition, for alternate molding lines in which the positional relationship between the upper frame and the lower frame is exchanged every one frame feed, it becomes possible to accommodate the cleaning device for the upper frame and the lower frame in the space of one frame, and the length of the molding line Can be shortened.

It is a front view which shows the upper frame pin cleaning state in the cleaning apparatus of this invention. It is a front view which shows the lower frame bush cleaning state in the cleaning apparatus of this invention. It is an AA arrow line view in FIG. It is a BB arrow line view in FIG. It is a partial detail drawing which shows the cleaning state of an upper frame pin. It is a partial detail drawing which shows the cleaning state of lower frame bush. It is a front view of the conventional layout which used each exclusive device for upper frame pin cleaning and lower frame bush cleaning.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, 11 is an upper frame for green sand mold molding, 12 is a lower frame for green sand mold molding. These upper frame 11 and lower frame 12 is a metal frame, are molding alternately in green sand mold molding line, the left and right sides as shown in FIG. 3 is supported by the roller conveyor 9, are arranged alternately moving, It is conveyed in the arrow direction on the conveyance line while repeating the stop .

  As shown in FIGS. 1 and 3, the upper frame 11 is provided with a pair of upper frame pins 1 at the center in the width direction of the front and rear thereof. Moreover, the lower frame 12 is equipped with the lower frame bush 2 in the width direction center part of the back and front, as shown to FIG. 2, FIG. In the post process, the upper frame 11 and the lower frame 12 are positioned by the upper frame pin 1 and the lower frame bush 2 to be mold-aligned. As described above, when the casting sand adheres to these parts, the pin and bush cleaning device 10 of the present invention is installed below the transfer line because the positioning can not be performed accurately.

  Reference numeral 20 denotes a base extending in the conveying line direction, and the crossing device 8 is provided on a rail 21 laid on the upper surface thereof. In this embodiment, the traversing device 8 is a carriage provided with wheels 22 and can be moved in the longitudinal direction of the transport line by a traversing cylinder 13 which is an actuator.

  A lift table 6 is mounted on the carriage which is the crossing device 8. The lifting table 6 is lifted by the lifting cylinder 14 toward the upper frame 11 and the lower frame 12, and is lowered after cleaning. Reference numeral 23 denotes a lift guide provided between the traverse device 8 and the lift table 6.

  A pair of upper frame cleaning brushes 3 and a pair of lower frame cleaning brushes 4 are provided on the upper surface of the elevating table 6. As shown in FIGS. 3 and 5, the upper frame cleaning brush 3 is formed so as to surround the upper frame pin 1 and is pivoted by an air motor 15 provided in the lower part of the upper frame pin 1. Clean the casting sand and other foreign substances adhering to the outer peripheral surface of 1. The lower frame cleaning brush 4 is inserted into the inner surface of the lower frame bush 2 as shown in FIGS. 4 and 6, and similarly, it is swirled by the air motor 15 to clean casting sand and other foreign matter adhering to the lower frame bush 2. It is a thing. Reference numeral 16 denotes a fixed air blower provided for removing sand, and is fixed to the base 20.

The pair of upper frame cleaning brushes 3 is provided at an interval between the front upper frame pin 1 and the rear upper frame pin 1 of the upper frame 11. The pair of lower frame cleaning brushes 4 is provided at a distance between the lower frame bush 2 on the front side of the lower frame 12 and the lower frame bush 2 on the rear side. However, as shown in FIGS. 1 and 2, the upper frame cleaning brush 3 and the lower frame cleaning brush 4 are disposed at a predetermined pitch in the longitudinal direction of the transport line. The traverse cylinder 13 as an actuator moves the traverse device 8 by this pitch.

Next, the cleaning method by the above-mentioned cleaning device will be described.
First, as shown in FIG. 1, when the upper frame is stopped at the position of the lifting table, the pair of upper frame cleaning brushes 3 is traversed so as to be positioned directly below the upper frame pins 1 and 1 of the front and back of the upper frame 11. The traverse device 8 is moved by the cylinder 13 and the lift table 6 is raised by the lift cylinder 14, and the upper frame cleaning brush 3 is turned by the air motor 15. In addition, air is injected from the air blowing device 16. As a result, as shown in FIG. 5, the casting sand and other foreign substances adhering to the upper frame pin 1 are cleaned .

Next, the elevating table 6 is lowered, and as shown in FIG. 2, the traverse device 8 is moved by the traverse cylinder 13 so that the pair of lower frame cleaning brushes 4 are directly below the lower frame bush 2 of the lower frame 12. Position. Then, the elevating table 6 is raised, and the lower frame cleaning brush 4 is turned by the air motor 15. In addition, air is injected from the air blowing device 16. As a result, as shown in FIG. 6, the casting sand and other foreign substances adhering to the inner surface of the lower frame bush 2 are cleaned .

  By repeating the above operation, it is possible to clean the pins and the bushes of the upper and lower frames in a molding line in which the upper frame and the lower frame are alternately molded. The apparatus of the present invention can accommodate the cleaning device for the upper and lower frames in a space of one frame. For this reason, as compared with the conventional apparatus shown in FIG. 7, there is an advantage that the length of the molding line can be shortened.

  In the embodiment described above, the upper frame pin 1 of the upper frame 11 and the lower frame bush 2 of the lower frame 12 are cleaned, but if bushes having different shapes in upper and lower frames are used, the same cleaning should be performed. Is possible.

  Further, in the embodiment of the present invention, when the upper frame pin 1 is cleaned, after the operation of the air motor 15 is started, the lift table 6 may be raised, or after the lift table 6 is raised, the air motor 15 may be removed. May be started. Alternatively, the lifting of the lift table 6 and the operation of the air motor 15 may be performed simultaneously. The same applies to the cleaning of the lower frame bush 2.

1 upper frame pin 2 lower frame bush 3 cleaning brush for upper frame 4 cleaning brush for lower frame 5 adjacent metal frame 6 lifting table 8 traverse device 9 roller conveyor 10 pin and bush cleaning device 11 upper frame 12 lower frame 13 traverse cylinder 14 Lifting cylinder 15 Air motor 16 Air blow device 20 Base 21 Rail 22 Wheel 23 Lifting guide 101 Upper frame pin 102 Lower frame bush 103 Pin cleaning brush 104 Bush cleaning brush 105 Upper frame dedicated pin cleaning device 106 Lower frame dedicated bush cleaning device 107 Frame Separation device 108 molding machine

Claims (3)

An upper frame with a pair of upper frame pins at the front and back, and a lower frame with a pair of lower frame bushes at the front and back are alternately arranged, and a lifting table below the transport line that is transported while repeating movement and stopping. On the lifting table, the pair of upper frame cleaning brushes for cleaning the pair of upper frame pins, and the pair of lower frame cleaning brushes for cleaning the pair of lower frame bushes. An actuator is provided which is installed at a predetermined pitch in a direction, and the lift table is moved laterally at the predetermined pitch, and a position corresponding to a pair of upper frame pins of the upper frame at which the pair of upper frame cleaning brushes stopped A pin / bush cleaning device for a metal frame characterized by switching between a position corresponding to a pair of lower frame bushes of a lower frame where a pair of lower frame cleaning brushes has stopped . The apparatus for cleaning a pin and bush of a metal frame according to claim 1, wherein the lifting table is placed on a traversing device and moved laterally in the longitudinal direction of the transfer line by an actuator . It is a cleaning method using a pin and bush cleaning device for a metal frame according to claim 2, which is an upper frame provided with a pair of upper frame pins at the front and back and a lower frame provided with a pair of lower frame bushes at the front and rear. Arranged alternately on the transport line to transport while repeating movement and stopping, when the upper frame stops at the position of the lifting table, raise the lifting table toward the upper frame and lift it by the pair of upper frame cleaning brushes The pins of the frame are cleaned, then the lifting table is lowered and moved laterally by the actuator, and the lifting table is raised toward the stopped lower frame and the bushes of the lower frame are cleaned with a pair of lower frame cleaning brushes. pin Bush method of cleaning metal frame which is characterized in that.

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